Steam-engine



(No Model.)

E. HUBER.

STEAM ENGINE. No. 414,045. Patented Oct. 29,1889..

i NTTED STATES PATENT OFFICE.

EDVARD HUBER, OF MARION, OIIIO.

STEAM-ENGIN E.

SPECIFICATION forming part of Letters Patent No. 414,045, dated October 29, 1889.

Application Elecl April 25, 1889. Serial No. 308,543. (No model.)

To all whom t may concern:

Be it known that I, EDWARD HUBER, of Marion, in the county of Marion and State of Ohio, have invented certain new and useful Improvements in Steam-Engines; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

My invention relates to an improvement in steain-engines, and more particularly to cylinders for such engines.

The object is to econoxnize steam and provide means for utilizing the power of steam the instant it passes int-o the cylinder.

lVith these ends in View my invention consists in a steam-cylinder having reciprocating heads therein and gearing for moving these heads at proper intervals to limit the livesteam space and close the exhaust-steam port back of the piston and to simultaneously increase the exhaust-steam space and open the exhaust-port in front of the piston.

My invention further consists in certain novel features of construction and combinations o'f parts, as will be hereinafter fully described, and pointed out in the claims.

In the accompanying drawings, Figure 1 is a side elevation of an engine. Fig. 2 is a plan view, and Figs. 3 and l are detached views of cam gear-wheels.

A represents the bed of the engine, and at one end of this bed the steam-cylinder B is located. The cylinder is of the usual construction, having the heads 1 1 secured to its ends. XVitb the cylinder the piston 2 is iitted, and from it piston-rod 3 extends outward through one of the cylinder-heads in the usual manner. A pair of movable heads 6' are itted in the cylinder-one at each end-and these heads not only follow the piston-head for a short distance, but also control the exhaust-ports, acting as valves for the latter. Stems 7 and S extend from the movable heads and G, respectively, out through the ends of the cylinder, and by means of these the heads are reciprocated at proper intervals. Rocking shafts 9 and 10 are located transversely of the cylinder at either end of the latter, and they are connected with the stems 7 and 8 by means of cranks 11 and 12, It is essential that these shafts should be rocked a certain distance and at certain predetermined intervals. To this end various systems of gearing may be resorted to, and `I do not wish to be limited to any particular system; but the following has been adopted as being practical. Bevel gear-wheels 13 and 14 are revolubly mounted with their backs toward the rocking shafts, and the backs of these Wheels are furnished with cams 15 and 16, respectively. These cams are somewhat peculiar in shape to suit the requirements. As constructed the greater portions 17 of these cams extend half around the wheels near and parallel with tlieirperiphe1'ies,and then bend inward to points 1S, about midway between the hub and periphery on the opposite side of the hub from the portions just described and concentric with the hub at the point where it comes nearest the latter. These wheels are placed on their shafts so that the cams extend in the same direction, for when one of the m0vable heads is nearest the end of the cylinder the other moves away from it, and vice versa. Arms 19 and 2O project from the ends of the shafts 9 and 10 adjacent to the gear-Wheel, and anti-friction rollers 21 and 22 on the ends of these arms engage the cams whereby the shafts are rocked. The usual exhaust-ports 23 extend from the ends of the cylinder, and these are controlled by the movable heads. A valvechest 24 is located on the cylinder and furnished with ports 25 and 26, which lead into the cylinder. The slide-valves 27 control the passage of steam to the cylinder, and these valves are reciprocated at suitable intervals by a connection with the piston-rod. (Not shown.)

The main shaft 28 is revolubly supported in pillowblocl 29, and on one end of this shaft a iiyavheel 30 is secured. A pitman 31 is connected at one end of this flywheel by strap-head 32 and at its opposite end to the crossehead 33, which slides in frame 3l and is secured to the piston-rod 3.

A bevel gear-wheel 35 is mounted on shaft 2S on the opposite side of the pillow-block from the fly-wheel, and a shaft 36, extending in proximity to the three geaiwheels 13, 14, and 35, is provided with bevel gear-wheels 39, 110, and 41, which mesh with said wheels.

It will be observed that as soon as the piston has made part of its stroke the m0v- ICQ LI .claimasnevv,gand desire tosecnrebyxlliett rigid heads l need not be air or steamtight. A.

Before or simultaneously with the return movement of the piston the head which was behind the piston now begins to move toward its rigid head, while the other head advances and closes the exhaust. The parts are so arranged that when the piston is at its extreme throw the strap-head has always passed its, deadecenteigso that .the full AAlex'Ie-rage of `thje ily-wheel Iis utilized. Thus .the advantages, are ,that Lthe .space kfor live ,steam `is rept .approximatelytthe same by the movable .head heepingaeertain ,distance from .the piston;Y `.that the greatest -.leverage is .takenadyantage of, .inasmuch ,as ,the strap-,head lllas passed; the @deadeeenter when :the steam :first l:venters i from :the .steam-,chest, ,and 4that the ,eg @ggfs steamisgimen inereasedspaee by the .with .areaal .of .the ghead, .thus .reducing the 'intesi r1-1re ion `.that .endof thepiston. tlisfevident Tthat gslightrchanges `:be resorted ,to Airl/,the forni .and .arrangement o the lsewferalfparts.described withoutdeparting I from .the ,spirit ,fand 4seep@ ,of inverti-011, and :hence 1 do not wishlto -limiftimyself .to Athe i -particulanoonstrnctionhereinsetfonth;\.but,

Having fully described my invention,:whajn s; "l

Patent, is-

l. llhecombinatiom witha Lcylinder having Vinlet and exhaust ports, of a piston, movable heads located Within the cylinder for closing the exhaust-ports, a main shaft actuated by the piston, a rotary shaft located alongside of the cylinder and extending in the direction of the length thereof, gearing connecting the Vrotary shaft and main shaft, and gearing on the rotary shaft for actuating the movable head,vsubstantially as set forth.

v2. lThe combination, with a steam-cylinder -and movable heads therein, of rocking shafts, bevel gear-wheels having cams for rocking the shafts, and gearing for operating the cams, ,substantially asset forth.

3. The combination,with a steam-cylinder and movable heads therein, of rocking shafts .connected with the heads, said shafts having -arms with anti-friction .rollers thereon, bevel gear-wheels.withcamson xtheir backsin which .said `rollers tra-veland means for turning-said gear.whe els, `substantially as set forth.

A. The combination, with a cylinder and ovable @heads,r.of stems connected with` the heads, rocking shafts for .dri-ving the stems, .arms ion .the ,shafts lwith rollers thereon, bevel ,gear-.wheels `having cams, .substantially .as Ydescribed, on their backswith which-the rollers engageamain shaft 4v.having a bevel vgear- `wheel, .and .a .shaft .having s.bevel ,gearfwheels meshedwiththe other gearfsvheels for Icom- Lmunieating motion,.substantiallyas ,set forth.

:In .testimony .whereof I have .signed this ,specification `in `the presence .of .two-subscribingrwtnesses HUB-ER. iWitnesses:

JorLN A. WoLno-RD,

JOHN MCNEAL. 

